Where can I find suitable opponents?
No it won't. The tactical problems are useless to me, I have never succeeded once and they are situation-specific (situations which never happen ever in the first place, given the sheer amount of possible outcomes in chess games). It only worked for you because you learned chess during your critical learning period when you were young. You already had a high elo and started lower than your true elo, hence the rise. It seems like I am doomed to never improving.
Yeah they're impossible without using some algorithm. I failed all of them using more than four time the target time.
If you want to improve, maybe you can get a personal trainer. Someone with an elo around 1500-1700 should be enough to teach you the basis, without being expensive.
I think I know why I can't improve now. I had no idea that chess was p2w and thought everybody started out on their own and improved steadily, like every regular games I played before.
I didn't know I could change the matching settings for elo difference, but really I need to reduce my elo in absolute value rather than the difference. My elo is overestimated by the system by the random wins I got (which were completely random and undeserved). I thought 600 elo were the total beginners NelsonMoore was talking about. Maybe they are lower but I can't see them in custom games.
For some reasons this site decided my elo is about 600 when it is in reality below 100, therefore I only get to play boring games, and I always win by chance, thereby preventing me from getting my true elo rating. I only get randomly matched with 600+ who always win, except for the one I'm playing against right now which just went afk like a loser for 15 minutes when he could easily have won. Now I "win" because he just resigned, raising my elo when it should have been a decay. How can I decrease my elo artificially? It seems like it's gonna take some time before I hit 100 and it is impossible for me to learn anything. The 600 elo players are already extremely advanced as they know how to stack pieces and predict the outcome.
Edit: Oh wait no, he did not resign, the system automatically kicked him I guess so I win by default, but I didn't learn anything.